*: Update six/future imports

Bug: b/240137096
Change-Id: I44f9d82ff8c3f319ca4ceb3065e46b2f915ab7db
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/103478
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Oliver Newman <olivernewman@google.com>
diff --git a/recipe_modules/roll_util/api.py b/recipe_modules/roll_util/api.py
index 3553d05..2bcb419 100644
--- a/recipe_modules/roll_util/api.py
+++ b/recipe_modules/roll_util/api.py
@@ -15,11 +15,11 @@
 
 import collections
 import re
+import urllib
 
 import attr
 import enum
 from recipe_engine import recipe_api
-from six.moves import urllib
 
 # If we're embedding the original commit message, prepend 'Original-' to lines
 # which begin with these tags.